12-letter words containing o, p, s, n, i
- viscountship — the position of being a viscount
- wapsipinicon — a river in E Iowa, flowing SE to the Mississippi River. 255 miles (410 km) long.
- west pointer — a graduate of the US Military Academy at West Point
- whipscorpion — any of numerous arachnids of the order Uropygi, of tropical and warm temperate regions, resembling a scorpion but having an abdomen that ends in a slender, nonvenomous whip.
- winning post — a post on a racetrack, marking the goal of a race.
- winnipegosis — Lake, a lake in S Canada, in W Manitoba, W of Lake Winnipeg. 2086 sq. mi. (5405 sq. km).
- zoosporangia — Plural form of zoosporangium.